Patents by Inventor Hirosi Nagai

Hirosi Nagai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Implant material
    Patent number: 4904534
    Abstract: Disclosed herein is a novel implant material excellent in biocompatibility, stability in living body and mechanical properties, comprising a metallic material and a layer of a thermosetting resin or a layer of a composition comprising the thermosetting resin and hydroxyapatite, the layer of the thermosetting resin or the layer of the composition being formed around the metallic material.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: February 27, 1990
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hirosi Nagai
  • Implant material with continuous and two-dimensional pores and process for producing the same
    Patent number: 4794046
    Abstract: Disclosed herein are a highly strong implant material having continuous passages in the two-dimensional direction, which is a ceramic material of hydroxyapatite and is useful as the substitutive material for bones in the fields of surgery and orthopedics or the filling material in the cavities of bones in the fields of dentistry and oral surgery, and a process for producing the implant material.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: December 27, 1988
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hirosi Nagai
  • Hydroxyapatite, ceramic material and process for preparing thereof
    Patent number: 4548959
    Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: October 22, 1985
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirosi Nagai, Yasushi Nishimura
  • Process for preparing an artificial dental root
    Patent number: 4451235
    Abstract: An artificial dental root comprised of a particulate or powdered form of synthetic hydroxyapatite or calcined or sintered synthetic hydroxyapatite or a mixture thereof and an organic matrix, the surface area of said artificial dental root to be brought into contact with a bone being composed of both a phase of said hydroxyapatite and a phase of said organic matrix. The artificial dental root is prepared by blending said hydroxyapatite with said organic matrix and molding the blend. The artificial dental root has moderate affinity for a bone and high mechanical strength.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: May 29, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kensuke Okuda, Hirosi Nagai, Hiroto Fujimaki, Atsushi Tomonaga, Hideki Aoki
  • Hydroxyapatite, ceramic material and process for preparing thereof
    Patent number: 4448758
    Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: May 15, 1984
    Assignee: Kureha Kagku Kagyo Kabushiki Kaisha
    Inventors: Hirosi Nagai, Yasushi Nishimura
  • Hydroxyapatite, ceramic material and process for preparing thereof
    Patent number: 4330514
    Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: May 18, 1982
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirosi Nagai, Yasushi Nishimura